water pump bearing

Water pump bearings are primarily used in automotive water pumps,
basically consisting of standard double row bearings.
These bearings are available in two main types:
1) Ball-ball: with two rows of balls; WIB, BWF, WS, WK, 885000
series, etc.
2) Ball-roller: with one row of balls, one row of rollers; WIR,
WN, WKH, 665000 series,etc.